Nanostructured High-Energy xLi(2)MnO(3)center dot(1-x)LiNi0.5Mn0.5O2 (0.3 <= x <= 0.6) Cathode Materials

作者：Zhang Xiaofeng; Lengyel Miklos; Axelbaum Richard L^*

来源：AICHE Journal, 2014, 60(2): 443-450.

DOI：10.1002/aic.14287

• Li-Mn-rich cathode
• xLi(2)MnO(3)center dot(1-x)LiNi0.5Mn0.5O2
• spray pyrolysis
• high-energy
• Li-ion battery

Nanostructured lithium-manganese-rich nickel-manganese-oxide xLi(2)MnO(3)<bold></bold>(1-x)LiNi0.5Mn0.5O2 (0.3x0.6) composite materials were synthesized via spray pyrolysis using mixed nitrate precursors. All the materials showed a composite structure consisting of Li2MnO3 (C2/m) and LiNi0.5Mn0.5O2 (R3<overbar></mml:mover>m<mml:mo stretchy="false">) components, and the amount of Li2MnO3-phase appeared to increase with x, as observed from XRD analysis. These composite materials showed a high-discharge capacity of about 250 mAhg(-1). In the range of x considered, the layered 0.5Li(2)MnO(3)<bold>0</bold>.5LiNi(0.5)Mn(0.5)O(2) materials displayed the highest capacity and superior cycle stability. Nonetheless, voltage suppression from a layered-spinel phase transition was observed for all the composites produced. This voltage suppression was dependent of the amount of Li2MnO3 phase present in the composite structure.

• 出版日期2014-2